Base of a cleaning machine



FIG. 1 is a front, perspective view of the base of a cleaning machine showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side-elevational view thereof, the right side-elevational view being a mirror image thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view therof.

The broken line showing of the upper housing and handle of a cleaning machine in FIGS. 1-4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a base of a cleaning machine, as shown and described. 